It is the time of the Napoleonic Wars. Young Peter Raven, a new midshipman in the British Royal Navy, uncovers, with the help of spy Commodore Beaumont, a sinister plot. Napoleon Bonaparte plans to take over America and make it part of his empire! Even worse, Napoleon makes a deal with the murderous pirate Count Vallon: in exchange for his gold, Vallon will be named "King of America!" Can Raven and Beaumont stop Napoleon before it's too late?